Electromotor



(No Model.)

J. H. IRWIN.

BLBGTRO MOTOR.

Patented July 4, 1882.

a N N x21 o a M55555 MMI %M //Zw m0/g K UNITED STATES PATENT OFFICE.

JOHN H. IRWIN, OF MORTON, PENNSYLVANIA.

ELECTROMOTOR.

SPECIFICATION forming part of Letters Patent No. 260,574, dated July 4,1882.

Application filed March 6, 1882.

To all whom it may concern:

Be it known that I, JOHN H. IRWIN, of Morton, county of Delaware, andState of Pennsylvania, have invented certain new and useful Improvementsin Electromotors, of which the following is a full, clear, and exactdescription, reference being had to the accompanyingdrawing, and to theletters of reference marked thereon.

My invention relates especially to motors employed for generating powerby the use of electricity, and has for its object the production of adevice wherein means are employed for automatically regulating the powerof the motor in accordance with the demands made thereon 5 and itconsists essentially in arran ing the constituent parts of the device insuch a manner that the relative surface of action between the armatureand field-of-force magnets may be automatically changed or varied bymeans of suitable governing mechanism engaging with the shaft of thearmature.

It is obvious that the device might be regulated by a screw turned bythe hand, as fully set forth and described in an application for LettersPatent for improvement in dynamo electric machines, filed by me February25, 1882, or by a lever engaging with the armature-shaft, as shown in mypresent invention, without the aid of an automatic device.

The drawing presented herewith represents a side elevation and partialsection of my motor.

Like letters of reference indicate corresponding parts.

A are the field-magnets, constructed in the usual manner, and wound withbobbins B. O is the armature, and D is the elongated shaft thereof. Eare the bearings therefor. F is the commutator. G is a pulley fortransmitting the power generated. H is a pulley placed upon shaft D forthe purpose of driving a governor, I, by means of pulley H.

Upon shaft D is located a sleeve bearing a series of rings or flanges,L. If desired, sleeve L may be loose upon the shaft and held fromlateral motion thereon by collars L, bearing set-screws Z. When smallpoweris needed the sleeve may be fixed upon the shaft in such a manneras to allow only a portion of armature O to enter the magnets.

(No model.)

I? is a toothed segment, mounted upon a shaft in suitable bearings, theteeth of said toothed segment engaging with the rings upon sleeve L.Attached to cog P is an arm, R, which, by

means of a rod, S, is connected with the governor-leverT. It is an armattached to toothed segment P, and bearing a counterbalancingweight, R

Upon the armature-shaft, which is extended a considerable distance oneach side from the armature, the commutator and power-transmittingpulley should preferably be placed, both upon one of the extensions ofsuch shaft, and the pulley to drive the governor and the mechanism formoving such shaft longitudinally upon the other extension, to the endthat such shaft may be supported steadily in the working of the machine.

When all the power generated by the motor is being utilized the armatureG will remain within the magnets. Should any of the mochaniealresistance placed upon the motor be removed, the rotation of thearmature will become more rapid, increasing the speed of the governor,depressing rod S. Thereby toothed segment P will be turned toward theright, drawing the armature from the magnets. When greater mechanicalresistance is added to the motor this operation will be reversed. Bythis means the speed of the motor will remain practically the same, thepower thereof being in accordance with the demands made upon it.

Having now fully described my invention, what I claim as new therein,and desire to secure by Letters Patent, is-

1. In combination with an electromotor having an armature shaft adaptedand arranged to draw or push the armature into the fieldof-forcemagnets, a series of rings or flanges on said shaft, and a toothedsegment arranged to mesh with said rings or flanges, SllbSt2llltially asand for the purposes set forth.

2. In combination with an electromotor having an armature-shaft adaptedand arranged to draw out or push the armatureinto the field of-forcemagnets, an adjustable sleeve upon said shaft, having a series of ringsor flanges, and a toothed segment arranged to mesh with said rings orflanges, substantially as and for 'the purposes set forth.

3. In combination with an electroniotor hav" in g an armatureshaftadapted and. arranged to draw out or push the armature into thefieldofforce magnets, a series of rings or flanges on said shaft, atoothed segment arranged to mesh with said rings or flanges, and agovernor connected with said toothed segment, substantially as and forthe purposes set forth.

4. In combination with an electromotor having an armature-shaft adaptedand arranged to draw out push the armature into the fieldof forcemagnets, an adjustable sleeve upon said shaft, having a series of ringsor flanges, a toothed segment arranged to mesh with said rings orflanges, and a governor connected with said toothed segment,substantially as and for the purposes set forth.

5. An eleetromotor having an armatureshaft extending in each directionfrom the armature, and carrying upon one extension a commutator and apower -transmitter pulley and upon the other extension a pulley to drivethe governor and the mechanism for movingthe shaft longitudinally,whereby the shaft may be supported more steadily in the working of themachine, substantially as described.

In testimony that I claim the foregoing I have hereunto set my hand inthe presence of two witnesses.

JOHN H. IRWIN.

Witnesses: Y

F. W. HANAFORD, A. M. PIERCE.

